Typical strawman excuse coming from a grade based team apologist comparing 2 years age based teams to single grade base team... The correct comparison is single grade(with holdbacks playing down) to single age(no holdbacks playing down)..which one is right for youth sports.
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I agree, though I think comparing it to U.S. Lacrosse age groups is more than a straw man. I think U9, U10, U11, U12 etc is the way to go, though I would probably move the age deadline to 8/1 given how common it is for parents of August boys to wait a year for kindegarten.